MESON Chess Problem Database

Problem Display
PID: 189549 (8/2pQq3/8/KB4pb/1p2p1P1/6B1/R1RP4/3k4 w - - 0 1)

van Dijk, Johannes

Die Schachwelt (Berlin), 1911

8/2pQq3/8/KB4pb/1p2p1P1/6B1/R1RP4/3k4

#2

8 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg4
      • 2.Qxg4#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Ra1#
        • 2.Rc1#
      • 1...Qf6
        • 2.Rc1#
      • 1...Qe5
        • 2.Rc1#
      • 1...Qg7
        • 2.Rc1#
      • 1...Qc5!
    • 1.Qd3?
      • threat
        • 2.Ra1#
        • 2.Qf1#
        • 2.Qe2#
      • 1...Bxg4
        • 2.Ra1#
        • 2.Qf1#
      • 1...Qf6
        • 2.Qe2#
      • 1...Qf8
        • 2.Ra1#
        • 2.Qe2#
      • 1...Qe5
        • 2.Qf1#
        • 2.Qe2#
      • 1...Qf7
        • 2.Ra1#
        • 2.Qe2#
      • 1...Qg7
        • 2.Qf1#
        • 2.Qe2#
      • 1...exd3!
    • 1.Qd4?
      • threat
        • 2.Qa1#
        • 2.Qg1#
      • 1...Qc5
        • 2.Qa1#
      • 1...Qf8
        • 2.Qa1#
      • 1...Qe5
        • 2.Qg1#
      • 1...Qf7
        • 2.Qa1#
      • 1...Qg7
        • 2.Qg1#
      • 1...e3
        • 2.Qa1#
        • 2.dxe3#
      • 1...Qf6!
  • Keys
    • 1.d4!
      • threat
        • 2.Be2#
      • 1...Bxg4
        • 2.Qxg4#
      • 1...exd4 ep
        • 2.Qxd3#
      • 1...Qc5
        • 2.dxc5#
      • 1...Qe5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(e);OGATE,XP(E)::QAB(H),XB(e)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);::R1(B)
        • Q(g);P_PINB(G)::R1(B)
      • Refutation
        • Q(g);P_PINB(G)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);::QAB1(H)
      • Refutation
        • P(c);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);P_PINB(G)::QAR(H)
        • Q(g);::QAR(H)
      • Refutation
        • Q(g);
  • Actual
    • P(C);
    • Threat
      • B(G)
    • Vars
      • B(e);OGATE,XP(E)::QAB(H),XB(e)
      • P(c);EP,OGATE,P_SPINP(c),XP(C)::QAR2(H),XP(c)
      • Q(g);OGATE,P_PINB(G)::QAR(H)+P(C),XQ(g)
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